| 462 | 9 | 43 |
| 下载次数 | 被引频次 | 阅读次数 |
采用改良后的水热法制备空心玻璃微球(HGM)/ZnIn_2S4/α-Fe_2O3漂浮型复合光催化剂。以HGM为载体,首先制备HGM/ZnIn_2S4复合微球,然后利用自制的纳米棒状α-Fe_2O3进一步改性,得到HGM/ZnIn_2S4/α-Fe_2O3漂浮型复合光催化剂。以六价铬(Cr6+)为目标污染物,研究了α-Fe_2O3含量、催化剂投加量和原液pH值对复合催化剂光催化活性的影响。结果表明:纳米棒状α-Fe_2O3与六方相型ZnIn_2S4形成异质结构并均匀负载在HGM表面,形成HGM/ZnIn_2S4/α-Fe_2O3复合光催化剂,与α-Fe_2O3粉体和HGM/ZnIn_2S4复合微球相比,HGM/ZnIn_2S4/α-Fe_2O3漂浮型复合光催化剂的催化性能显著提高,且再循环后仍具有良好的光催化效率,并提出了HGM/ZnIn_2S4/α-Fe_2O3的增强型光催化机制。
Abstract：A floating composite photocatalyst of hollow glass microspheres(HGM)/ZnIn_2S4/α-Fe_2O3 was prepared by a modified hydrothermal method. The HGM/ZnIn_2S4 composite was firstly prepared with HGM as a carrier, and then further modified with nanorod-shaped α-Fe_2O3 to obtain the floating composite photocatalysts of HGM/ZnIn2 S4/α-Fe_2O3. The effects of α-Fe_2O3 content, photocatalysts addition and solution pH value on the photocatalytic activity of the composite photocatalysts for the degradation of hexavalent chromium(Cr6+) were investigated. The results show that α-Fe_2O3 and hexagonal ZnIn_2S4 heterogeneous structure are formed, and the composite photocatalyst is uniformly loaded on the surface of HGM. Compared to α-Fe_2O3 powder and HGM/ZnIn_2S4 composite microspheres, the photocatalytic performance of HGM/ZnIn_2S4/α-Fe_2O3 is improved. The prepared composite photocatalyst still has a good photocatalytic efficiency after several recycling. In addition, the synthesis mechanism of HGM/ZnIn_2S4/α-Fe_2O3 and its enhanced photocatalytic mechanism were also discussed.
[1] WU Q P, ZHAO J, QIN G H, et al. Photocatalytic reduction of Cr(VI)with TiO2 film under visible light[J]. Appl Catal B-Environ, 2013,142–143:142–148.
[2] BELISA A, MARINHO, RAQUEL O, et al. Photocatalytic reduction of Cr(VI)over TiO-coated cellulose acetate monolithic structures using solar light[J]. Appl Catal B-Environ, 2017, 3:18–30.
[3] ZHANG X, SUN Y, CUI X, et al. Carbon-incorporated TiO2microspheres:Facile flame assisted hydrolysis of tetrabutyl orthotitanate and photocatalytic hydrogen production[J]. Int J Hydrogn Energy, 2012, 37:1356–1365.
[4]夏自龙. ZnIn2S4光催化剂的制备、改性及其催化性能研究[D].广州:华南理工大学, 2014.XIA Zilong. Preparation, modification and catalytic performance of ZnIn2S4 photo-catalyst(in Chinese, dissertation). Guangzhou:South China University of Technology, 2014.
[5] PENG S J, ZHU P N, THAVASI V, et al. Facile solution deposition of ZnIn2S4 nano-sheet films on FTO substrates for photoelectric application[J]. Nanoscale, 2011, 3:2602–2608.
[6] FANG F, CHEN L, CHEN Y B, et al. Synthesis and photocatalysis of ZnIn2S4 nano/micropeony[J]. J Phys Chem C, 2010, 114:2393–2397.
[7] CHEN Z X, LI D Z, ZHANG W J, et al. Low-temperature and template-free synthesis of ZnIn2S4 microspheres[J]. Inorg Chem, 2008,47:9766–9772.
[8]魏清莲,穆帅严亚,等. ZnIn2S4的制备及其表面活性剂辅助的形貌控制生长[J].无机化学学报, 2010, 26:269–273.WEI Qinlian, MU Shuai, YAN Ya, et al. J Inorg Chem(in Chinese),2010, 26:269–273.
[9] YANG S, LI L, YUAN W H, et al. Enhanced visible light photocatalytic activity of Zn In2S4 modified by semiconductors[J].Dalton Trans, 2015, 44:6374.
[10]钟剑. La2O3/ZnIn2S4/RGO/Bi VO4 Z型催化剂的优化及其光催化产氢性能的研究[D].深圳:哈尔滨工业大学, 2016.ZHONG Jian. Study on optimization of z-scheme catalyst La2O3/ZnIn2S4/RGO/BiVO4 and its performance of photocatalytic hydrogen production(in Chinese, dissertation). Shenzhen:Harbin Institute of Technology, 2016.
[11]何俣,朱永法,喻方.玻璃珠负载中孔TiO2纳米薄膜光催化研究[J].无机材料学报, 2004, 19:385-390.HE Yu, ZHU Yongfa, YU Fang. J Inorg Mater(in Chinese), 2004, 19:385-390.
[12]窦艳鹏,孙淑芹,吴湘锋.高性能空心玻璃微珠的制备及其表面改性进展[J].中国粉体工业, 2012, 1:7–13.DOU Yanpeng, SUN Shuqin, WU Xiangfeng. Powder Ind(in Chinese),2012, 1:7–13.
[13]苟丹,王雷磊,王磊.空心玻璃微珠/ZnIn2S4纳米复合微球的制备及性能[J].科学通报, 2018, 63(25):2612–2619.GOU Dan, WANG Leilei, WANG Lei. Sci Bull(in Chinese), 2018,63(25):2612–2619.
[14]姜建辉,邓臣强,曹钰,等. Y和Si共掺杂纳米TiO2的制备及光催化性能[J].硅酸盐学报, 2019, 47(7):942–950.JIANG Jianhui, DENG Chenqiang, CAO Yu, et al. J Chin Ceram Soc,2019, 47(7):942–950.
[15] JING D W, LIU M C, GUO L J. Enhanced hydrogen production from water over Ni doped ZnIn2S4 micros-phere photocatalysts[J]. Catal Lett,2010, 140:167–171.
[16] YANG C, WANG W, SHAN Z, et al. Preparation and photocatalytic activity of high-efficiency visible-light-responsive photocatalyst SnSx/TiO2[J]. J Solid State Chem France, 2009, 182:807–812.
[17] KANG S Z, YANG Y K, BU W, et al. TiO2 nanoparticles incorporated with CuInS2C iusters:Preparation and photocatalytic activity for degradation of 4-nitrophenol[J]. J Solid State Chem France, 2009, 182:2972–2976.
[18] CHEN W, LIU T Y, HUANG T, et al. Novel mesoporous P-doped graphitic carbon nitride nano-sheets coupled with ZnIn2S4 nanosheets as efficient visible light driven heterostructures with remarkably enhanced photo-reduction activity[J]. Nanoscale, 2016, 8(6):3711.
[19] AHMMAD B, LEONARD K, ISLAM M S, et al. Green synthesis of mesoporous hematite(α-Fe2O3)nanoparticles and their photocatalytic activity[J]. Adv Powder Technol, 2013, 24(1):160–167.
[20] ZHU M Y, KAN J R, PAN J M, et al. One-pot hydrothermal fabrication ofα-Fe2O3@C nano-composites for electrochemical energy storage[J].J Energy Chem, 2019, 28:1–8.
[21] GAO B, LIU L F, LIU J D, et al. Photocatalytic degradation of2,4,6tribromophenol on Fe2O3 or FeOOH doped ZnIn2S4heterostructure:Insight into degradation mechanism[J]. Appl Catal B:Envir, 2014, 147:929–939.
[22]潘帅,贺蒙,王旭,等.离子液体辅助合成α-Fe2O3纳米棒及其气敏性能[J].硅酸盐学报, 2019, 47(3):336–344.PAN Shuai, HE Meng, WANG Xu, et al. J Chin Ceram Soc, 2019,47(3):336–344.
[23]王宇飞,杨智,张慧萍,等.光度法测定常量铬(Ⅲ)[J].云南师范大学学报, 2000, 5:72–73.WANG Yufei, YANG Zhi, ZHANG Huiping, et al. J Yunnan Norm Univ(in Chinese), 2000, 5:72–73.
[24] LI Y, ZHANG K, PENG S, et al. Photocatalytic hydrogen generation in the presence of ethano-lamines over Pt/ZnIn2S4under visible light irradiation[J]. J Mole Catal A:Chem, 2012,363–364:354–361.
基本信息:
DOI：10.14062/j.issn.0454-5648.2020.07.20190682
中图分类号:O643.36;O644.1
引用信息:
[1]韩煦,王雷磊,王磊,等.α-Fe_2O_3改性空心玻璃微球/ZnIn_2S_4复合催化剂的制备及增强型光催化性能[J].硅酸盐学报,2020,48(07):1097-1106.DOI:10.14062/j.issn.0454-5648.2020.07.20190682.
基金信息:
陕西省重点科技创新团队计划(2017KCT-19-01);; 陕西省重点产业链(群)项目(2017ZDCXL-GY-07-03);; 陕西省技术创新引导专项(2018HJCG-18)
2020-04-13
2020-04-13
2020-04-13